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5 Cards in this Set
- Front
- Back
Atomic mass |
The average mass of all the isotopes of an element |
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Period |
Horizontal row of elements in the periodic table |
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Group |
Elements in the same vertical column of the periodic table ;also called family |
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Chemical symbol |
A one- or two-letter representation of an element |
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Periodic table |
A chart of the elements showing the repeating pattern of their properties |